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The asymptotic field of mode I quasi-static crack growth on the interface between a rigid and a pressure-sensitive material

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Title:
The asymptotic field of mode I quasi-static crack growth on the interface between a rigid and a pressure-sensitive material
Author(s):
MA Wen-jun1* and TANG Li-qiang2
Affilations:
Author(s):
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1. College of Science, Harbin Engineering University, Harbin 150001, China
2. College of Civil Engineering, Harbin Engineering University, Harbin 150001, China
Keywords:
pressure-sensitive material;  mode I quasi-static interface crack;  crack-tip field;  asymptotic analysis
分类号:
-
DOI:
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Abstract:
A mechanical model of the quasi-static interface of a mode I crack between a rigid and a pressure-sensitive viscoelastic material was established to investigate the mechanical characteristic of ship-building engineering bi-materials. In the stable growth stage, stress and strain have the same singularity, ie . The variable-separable asymptotic solutions of stress and strain at the crack tip were obtained by adopting Airy’s stress function and the numerical results of stress and strain in the crack-tip field were obtained by the shooting method. The results showed that the near-tip fields are mainly governed by the power-hardening exponent n and the Poisson ratio of the pressure-sensitive material. The fracture criterion of mode I quasi-static crack growth in pressure-sensitive materials, according to the asymptotic analyses of the crack-tip field, can be viewed from the perspective of strain.

References:

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Last Update: 2010-05-02